JPH05237957A - Production method of shoulder bladder for tire molding machine and shoulder bladder thereby - Google Patents
Production method of shoulder bladder for tire molding machine and shoulder bladder therebyInfo
- Publication number
- JPH05237957A JPH05237957A JP4151890A JP15189092A JPH05237957A JP H05237957 A JPH05237957 A JP H05237957A JP 4151890 A JP4151890 A JP 4151890A JP 15189092 A JP15189092 A JP 15189092A JP H05237957 A JPH05237957 A JP H05237957A
- Authority
- JP
- Japan
- Prior art keywords
- bladder
- rubber
- cord
- bag
- drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 238000000465 moulding Methods 0.000 title claims description 12
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 18
- 239000004744 fabric Substances 0.000 claims description 7
- 239000011265 semifinished product Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 4
- 238000004073 vulcanization Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000007847 structural defect Effects 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000011324 bead Substances 0.000 description 13
- 238000005452 bending Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/24—Drums
- B29D30/26—Accessories or details, e.g. membranes, transfer rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/24—Drums
- B29D30/26—Accessories or details, e.g. membranes, transfer rings
- B29D2030/2614—Bladders associated with the building drum, e.g. bladders used for the toroidal expansion, bladders for turning-up the plies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/24—Drums
- B29D30/26—Accessories or details, e.g. membranes, transfer rings
- B29D2030/2628—Bladders for shaping the inner parts of the tyre beads or sidewalls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
- B29D2030/3221—Folding over means, e.g. bladders or rigid arms
- B29D2030/3228—Folding over means, e.g. bladders or rigid arms using one bladder acting on each side of the drum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
- B29D2030/3221—Folding over means, e.g. bladders or rigid arms
- B29D2030/3235—Folding over means, e.g. bladders or rigid arms using two or more bladders acting on each side of the drum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1028—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith
- Y10T156/103—Encasing or enveloping the configured lamina
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1036—Bending of one piece blank and joining edges to form article
- Y10T156/1038—Hollow cylinder article
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、タイヤを成形する際に
使用されるタイヤ成形機用内側ブラダー(ショールダー
ブラダーまたは押圧嚢)の製造方法および該方法によっ
て得られる内側ブラダーに係わる。さらに詳しく言え
ば、少なくとも1層以上のプライコード(カーカス・プ
ライコード)をラジアル方向に配列したタイヤの半径方
向外側に少なくとも2層以上のベルトを設けたタイヤに
あって、生タイヤの製造時に、タイヤ・ビード部の内側
を支持し、また半径方向の外側に2層以上のベルトを圧
着するときに、タイヤ内部に加えられる空気圧力の維持
および空気の漏出防止のために使用されるタイヤ成形機
用内側ブラダーの製造技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an inner bladder (shoulder bladder or pressure bladder) for a tire molding machine used for molding a tire and an inner bladder obtained by the method. More specifically, in a tire provided with at least two layers of belts on the outer side in the radial direction of a tire in which at least one layer of ply cords (carcass ply cords) is arranged in the radial direction, A tire molding machine used to maintain the air pressure applied to the inside of the tire and prevent air leakage when supporting the inside of the tire / bead portion and crimping two or more layers of belts to the outside in the radial direction. The present invention relates to a manufacturing technology of an inner bladder for use.
【0002】[0002]
【従来技術、および発明が解決しようとする課題】従来
におけるタイヤ成形機用内側ブラダー(ショールダーブ
ラダーまたは押圧嚢)を図10、図11を引用して説明
する。ブラダーの組立て部位(CDEF)内の構成物質
である金属コード(鋼コード)13,14(金属線が円
筒状態で2層に巻かれているもの)は、ゴムシートおよ
びコードから成るコード・ゴム組合せ体11,12でC
−F−E−D−C−F部位形態に巻き包み、ブラダーの
膨張部位の構成材料である本体プライ17、内側ゴム1
6、カバーゴム18はジョイント位置がブラダーの上部
に形成されており、一方、例をとって図10における従
来のブラダーは図13から図18までに示されるような
順序で製造される。2. Description of the Related Art A conventional inner bladder (shoulder bladder or pressure sac) for a tire molding machine will be described with reference to FIGS. 10 and 11. The metal cords (steel cords) 13 and 14 (metal wires wound in two layers in a cylindrical state), which are the constituent materials in the bladder assembly part (CDEF), are rubber sheets and cord / rubber combination consisting of cords. C in body 11, 12
-F-E-D-C-F body ply 17, which is a constituent material of the expansion part of the bladder, wrapped in a site form, inner rubber 1
6. The cover rubber 18 is formed on the upper portion of the bladder at the joint position, while the conventional bladder shown in FIG. 10 is manufactured in the order shown in FIGS. 13 to 18 by way of example.
【0003】すなわち、図12から図18までの各図に
より従来の内側ブラダー製造工程を説明すると次のとお
りである。ブラダーを構成する半製品、すなわち内側ゴ
ム16、本体プライ17、カバーゴム18をつけ、これ
らの端部を傾斜裁断して得た半製品にバルブ27を付着
し、折曲具39(図12)で上記半製品の傾斜した部位
の一方を折ってKラインに一致させた後、バルブ27の
付いた側を、そのバルブ27が外側を向くように折って
上記Kラインにつけて袋体(#1)24を作る。次に、
ブラダーの組立て部位(CDEF)にコード・ゴム組合
せ体11,12、金属コード13,14を挿入してから
上記袋体(#1)24を裏返してバルブ27が内側を向
くようにして本体ドラム(モールド本体)30Aおよび
外側ドラム(外側モールド)31Aを組立てた後、袋体
(#1)24の折れた部分の端部(I′J′)部位にス
トリップゴム20(図3参照)を付着し、その表面には
織布19を付着してから表面全体を所定の幅から成る内
側チューブ35で巻いて温度140℃〜160℃の蒸気
を供給して加硫する。That is, the conventional inner bladder manufacturing process will be described with reference to FIGS. 12 to 18. The valve 27 is attached to the semi-finished product that constitutes the bladder, that is, the inner rubber 16, the main body ply 17, and the cover rubber 18 are attached and the end portions of these are cut off, and the valve 27 is attached, and the bending tool 39 (FIG. 12). Then, fold one of the inclined parts of the semi-finished product to match the K line, and then fold the side with the valve 27 so that the valve 27 faces outward and attach it to the K line. ) Make 24. next,
After inserting the cord / rubber combination bodies 11 and 12 and the metal cords 13 and 14 into the assembly portion (CDEF) of the bladder, the bag body (# 1) 24 is turned upside down so that the valve 27 faces inward. After assembling the mold body 30A and the outer drum (outer mold) 31A, attach the strip rubber 20 (see FIG. 3) to the end (I′J ′) of the folded portion of the bag body (# 1) 24. After the woven cloth 19 is attached to the surface, the entire surface is wound with an inner tube 35 having a predetermined width and steam at a temperature of 140 ° C. to 160 ° C. is supplied for vulcanization.
【0004】しかし、上記のようなブラダー製造方法で
製造された内側ブラダーは次のような欠点を有する。先
ず第一点として、ブラダーの組立て部位がコード・ゴム
組合せ体で金属コード13,14だけを包んでいるの
で、ブラダーが膨張、収縮を繰り返す時、応力が最も集
中するC部位に往々にして分離が発生する欠点があっ
た。したがって、図2のように内側ブラダー1Aが膨張
した後、タイヤのビード部位の形状を製造する時と、ベ
ルト8およびトレッド9を付着する時にブラダーの割れ
および分離位置Cから空気が漏出し、これによってブラ
ダー膨張前のタイヤ半製品の中心線と生タイヤ製造時の
中心線が一致しなくなるため、ベルト8とトレッド9と
が適正位置に付着できず、タイヤの均一性に致命的な影
響を与えていた。特に、生タイヤの製造時に、ブラダー
のC部位に微細な割れと分離が生じたことを作業者が感
知できないほどに軽微な空気の漏出がある場合でも、タ
イヤの不良率が増加するだけでなく、タイヤの品質にま
で決定的な影響を及ぼす。第二点として、ブラダーの本
体プライ17の結合位置がブラダーの上部に位置し、ブ
ラダーの膨張現象が図2で1′−1のように維持される
ため、生タイヤ・ビード部位の成形する時、生タイヤ・
ビードの内側でブラダーの支持力が弱くなり、そのため
本体プライ6Aの端部6A−1とビード膨らみ部(ビー
ドハンプ)(BH)の各位置から多量の空気が含入可能
となり、タイヤの品質に致命的な悪影響を及ぼすことに
なるだけでなく、ベルト8とトレッド9を生タイヤに付
着する時、ブラダーの支持力が弱いために、中心位置の
ずれた付着が行われる可能性が増大し、タイヤの品質、
特に均一性阻害の要因にもなる。第三点として、ブラダ
ーの半製品である内側ゴム16、本体プライ17、カバ
ーゴム18の結合位置が円周上のただ1箇所に限られる
ため、膨張時に均一な円周方向の寸法が得難い。第四点
として、ブラダーの表面を内側チューブ35と一緒に加
硫するために、内側チューブ35を巻く時に幅方向の各
部位別または円周上の各位置別に巻く回数および張力の
差異によって加硫中幅方向中心部位が両端部位に比して
いっそう多く膨張するため、各部位の寸法変化を招き、
幅と円周方向への均一な寸法を有するブラダーが得られ
難く、またその表面も滑らかに仕上がらない。以上のよ
うにして製造されるブラダーを用いた成形機によってタ
イヤを製造すると、タイヤの各品質、特に均質性に多く
の悪影響を及ぼす。これは、成形機に組付けられるブラ
ダーの寸法偏差によってタイヤの品質が左右されるから
である。However, the inner bladder manufactured by the above-mentioned bladder manufacturing method has the following drawbacks. First of all, since the assembly part of the bladder wraps only the metal cords 13 and 14 with the cord / rubber combination body, when the bladder repeatedly expands and contracts, it is often separated into the C part where the stress is most concentrated. There was a drawback that occurs. Therefore, after the inner bladder 1A is inflated as shown in FIG. 2, air is leaked from the cracks and the separation position C of the bladder when manufacturing the shape of the bead portion of the tire and when the belt 8 and the tread 9 are attached. As a result, the center line of the semi-finished tire before bladder expansion and the center line of the raw tire during manufacturing will not match, and the belt 8 and tread 9 will not be able to adhere to the proper position, which will have a fatal effect on the tire uniformity. Was there. In particular, during the production of green tires, even if there is a slight air leak such that the operator cannot detect the occurrence of fine cracks and separation in the C portion of the bladder, not only the defect rate of the tire increases but also , Has a decisive influence on the quality of tires. The second point is that the bladder body ply 17 is located at the upper part of the bladder and the expansion phenomenon of the bladder is maintained as shown by 1'-1 in FIG. , Raw tires
The support force of the bladder is weakened inside the bead, so that a large amount of air can be included from each position of the end part 6A-1 of the main body ply 6A and the bead bulge part (bead hump) (BH), which is fatal to the tire quality. When the belt 8 and the tread 9 are attached to the raw tire, the support force of the bladder is weak, which increases the possibility that the center position may be offset. The quality of
In particular, it also becomes a factor of inhibiting uniformity. Thirdly, since the inner rubber 16, the main body ply 17, and the cover rubber 18, which are semi-finished products of the bladder, are connected to only one position on the circumference, it is difficult to obtain a uniform circumferential dimension during expansion. Fourth, in order to vulcanize the surface of the bladder together with the inner tube 35, the inner tube 35 is vulcanized according to the number of times of winding and tension at each position in the width direction or at each position on the circumference. Since the central part in the middle width direction expands more than both end parts, it causes dimensional changes of each part,
It is difficult to obtain a bladder having a uniform width and circumferential dimension, and the surface of the bladder cannot be finished smoothly. When a tire is manufactured by a molding machine using the bladder manufactured as described above, each quality of the tire, particularly homogeneity, is adversely affected. This is because the tire quality is affected by the dimensional deviation of the bladder assembled in the molding machine.
【0005】本発明は、かかる技術的背景の下で創案さ
れたものであり、従来のブラダー成形方法と、該方法に
よって得られるブラダーの欠点を改良することをその目
的とする。本発明は、特に内側ブラダー(ショールダー
ブラダー)の膨張、収縮の反復において応力が集中する
C部位の構造上の欠点を取除いてタイヤの品質を向上さ
せ、ブラダーの寿命を延長させ得る方法を提供せんとす
るものである。The present invention was devised under such a technical background, and an object thereof is to improve the drawbacks of the conventional bladder molding method and the bladder obtained by the method. The present invention provides a method for improving the quality of tires and prolonging the life of bladders, by eliminating the structural defects of the C portion where stress is concentrated during repeated expansion and contraction of the inner bladder (Shoulder bladder). It is intended to be provided.
【0006】[0006]
【課題を解決するための手段】本発明は第一の側面によ
れば、内側ブラダーが生タイヤのビード部の内側を支持
し、さらにベルトおよびトレッドを圧着する時、生タイ
ヤ内部の空気漏出を防ぐ機能を反復遂行する過程におい
て、内側ブラダーの組立て位置と膨張部位が連結する箇
所、すなわち応力集中の生じる箇所において、ブラダー
膨張部位構成材質である本体プライ、内側ゴム、カバー
ゴムと組立て部位の構成材料である金属コードをコード
・ゴム組合せ体でもって一体物として取り巻き包み合わ
せる。換言すれば、コード・ゴム組合せ体11,12を
G部位からI部位までG−F−E−D−C−B−A−I
の順に巻き込み(図3参照)、上記コード・ゴム組合せ
体11,12の配列は円周方向を基準として90°に位
置させ、膨張時にブラダーの原形維持のためにブラダー
の各位置別ゲージが均一でなければならないから、図
5、図6に示されるように、本体プライの結合部が膨張
しないCF組立て部位に位置するように構成した。ま
た、本発明の他の側面によれば、半径方向への製品突出
を均一になし、最終製品の幅方向または円周方向におけ
る各部位のゲージ寸法を均一になし、なおブラダーの断
面径、すなわち本体プライの長さの偏差を最小化できる
ようになし、ブラダー表面に織布19を堅固に付着する
とともに、ブラダーの表面を円滑に製造できる方法が提
供される。According to the first aspect of the present invention, when an inner bladder supports the inside of a bead portion of a raw tire and further presses a belt and a tread, air leakage inside the raw tire is prevented. In the process of repeatedly performing the preventive function, in the place where the assembly position of the inner bladder and the expansion part are connected, that is, the part where stress concentration occurs, the structure of the body ply, the inner rubber, the cover rubber and the assembly part which are the bladder expansion part constituent materials The metal cord, which is the material, is wrapped and wrapped as a unit with a cord / rubber combination. In other words, the cord / rubber combination bodies 11 and 12 are moved from the G portion to the I portion to G-F-E-D-C-B-A-I.
(Refer to FIG. 3), the cord / rubber combination bodies 11 and 12 are arranged at 90 ° with respect to the circumferential direction, and the bladder position gauges are uniform to maintain the original shape of the bladder during expansion. Therefore, as shown in FIGS. 5 and 6, the connecting portion of the main body ply is located at the CF assembly site where expansion does not occur. Further, according to another aspect of the present invention, the product projection in the radial direction is made uniform, the gauge size of each part in the width direction or the circumferential direction of the final product is made uniform, and the sectional diameter of the bladder, that is, A method is provided for minimizing the deviation in the length of the main body plies, firmly attaching the woven cloth 19 to the surface of the bladder, and smoothly manufacturing the surface of the bladder.
【0007】上記の問題点を解決するための本発明の製
造方法を要約すると次のとおりである。 ブラダーを構成する内側ゴム16、本体プライ1
7、カバーゴム18を所定の長さに裁断して折曲具39
の円周上で等間隔に分散させて袋体(#3)を得る。 ブラダーの表面にカバーゴム32を組付けてブラダ
ーの内部に約3.5〜6.5kg/cm2 圧力の空気を
注入しながら加硫し、加硫が進む間にブラダーを幅、円
周方向の各部位を均一に押してやることによって設計上
要求される各部位の均一なゲージ寸法を持たせる。 上記項の袋体(#3)を所定の長さに裁断し、折
曲具39の円周上に等間隔に分散させ、本体ドラム30
に挿入したあと予め用意したバルブ接合管23をバルブ
軸胴21の螺子部に組立て、袋体(#3)26の基準面
Cの反対端部P3Cを一定位置に錐34で固定した後、
外側ドラム31のABC部位に押してブラダーの断面直
径をつくる。 ブラダーの表面にセメントを塗布し、セメントが乾
燥してから接着剤で処理した織布19のナイロン部分が
ゴム面と接触するように付着したあと上記のとおりブラ
ダーの表面をドラム蓋32で組立て、内部に3.5〜
6.5kg/cm 2 の圧力空気を注入しながら加硫する
とブラダーの表面が注入される空気圧によってドラム蓋
32表面に押されてゴムと織布19の圧着効果により織
布19が堅固に接着でき、同時にブラダーの表面も滑ら
かに仕上がる。[0007] The production of the present invention to solve the above problems
The manufacturing method is summarized as follows. Inner rubber 16 constituting the bladder, body ply 1
7, the cover rubber 18 is cut into a predetermined length and the folding tool 39 is cut.
A bag (# 3) is obtained by dispersing it at equal intervals on the circumference of. Attach the cover rubber 32 to the surface of the bladder
-Approximately 3.5 to 6.5 kg / cm inside2Pressure air
Vulcanize while pouring, and while the vulcanization progresses, open the bladder
Designed by uniformly pressing each part in the circumferential direction
Provide uniform gauge dimensions for each part required. Cut the bag (# 3) above to a specified length and fold it.
The bending member 39 is dispersed at equal intervals on the circumference, and the main drum 30
After inserting into the
Assembled on the screw part of the shaft body 21, and the reference surface of the bag body (# 3) 26.
After fixing the opposite end P3C of C to a fixed position with the cone 34,
Push it to the ABC part of the outer drum 31 and straighten the cross section of the bladder.
Create a diameter. Apply cement to the surface of the bladder and allow the cement to dry.
The nylon part of the woven cloth 19 which has been dried and treated with an adhesive is
After attaching it so that it contacts the rubber surface,
Assemble the surface of the dar with the drum lid 32 and put 3.5 to the inside.
6.5 kg / cm 2Vulcanize while injecting pressurized air
And the drum lid by the air pressure that the surface of the bladder is injected
32 Pressed on the surface and woven by the pressure bonding effect of the rubber and the woven cloth 19.
The cloth 19 can be firmly adhered and the surface of the bladder can be slid at the same time.
Finished with crab.
【0008】[0008]
【実施例】以下、図4から図9までの図面を引用して本
発明の説明を行う。 バルブ27のバルブ軸胴21にゴムを付着して加硫
した後、加硫されたゴム表面の基部底面を研磨する。 ブラダーの組立て部位(CDEF)に挿入した半製
品であるコード・ゴム組合せ体11,12と金属コード
13,14を折曲具で分散させて接合し、袋体(#2)
25を形成する。 ブラダーを構成する内側ゴム16、本体プライ1
7、カバーゴム18を所定の長さに裁断した後、折曲具
の円周上に等間隔に分散させて接合し、袋体(#3)2
6を形成する。 内側ブラダーの組立て部位である本体ドラム30の
EE′部位に上記袋体(#2)25を挿入した後、外側
ドラム31を組立て、袋体(#2)25のコード・ゴム
組合せ体11,12を外側ドラムのAB部位に付着させ
る。 次に、袋体(#3)26を本体ドラム30に挿入す
るが、このとき予め準備したバルブ27を袋体(#3)
26に付着し、その端部が外側ドラム31の基準面Cに
位置するようにする。 上記の予め準備したバルブ接合管23をバルブ軸胴
21の螺子部に組立てた後、袋体(#3)26の基準面
Cの反対端部P3Cを折ってHラインに一致させ、この
部位を錐34で固定させるが、袋体(#3)26を折る
前にブラダーの上下に半製品が接着しないように離型剤
を塗布する。 袋体(#3)26を外側ドラム31のABC部位に
押して圧着した後、袋体(#2)25のコード・ゴム組
合せ体11,12を接着し、生ブラダーの表面を内側チ
ューブ35で軽く巻き、ブラダーの縁部位(IJ)にス
トリップゴム20(膨張ブラダーの円形を保つ機能を有
する)(図3参照)を付着し、内側チューブをほどく。 ブラダーの表面にセメントを塗布した後、織布19
を付着し、ドラム蓋32を組付ける。 加硫作業で蒸気を入れる前に、ブラダーの内部に圧
縮空気を挿入し得るようにホース(図示されず)を組立
て、空気と蒸気を同時に注入して加硫し、ブラダー内部
の圧力を抜いた後、ドラム蓋32および外側ドラム31
を分離する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings of FIGS. After rubber is attached to the valve shaft body 21 of the valve 27 and vulcanized, the base bottom surface of the vulcanized rubber surface is polished. The semi-finished cord / rubber combination bodies 11 and 12 and the metal cords 13 and 14 inserted into the bladder assembly portion (CDEF) are dispersed by a bending tool and joined together to form a bag body (# 2).
25 is formed. Inner rubber 16 constituting the bladder, body ply 1
7. After cutting the cover rubber 18 into a predetermined length, the cover rubber 18 is dispersed at equal intervals on the circumference of the bending tool and joined to form a bag (# 3) 2
6 is formed. After inserting the bag body (# 2) 25 into the EE 'portion of the main body drum 30 which is an assembly portion of the inner bladder, the outer drum 31 is assembled and the cord / rubber combination body 11, 12 of the bag body (# 2) 25 is assembled. To the AB portion of the outer drum. Next, the bag body (# 3) 26 is inserted into the main body drum 30, and at this time, the valve 27 prepared in advance is used as the bag body (# 3).
26 so that its end is located on the reference plane C of the outer drum 31. After assembling the above-prepared valve joining pipe 23 to the thread portion of the valve shaft body 21, the opposite end P3C of the reference plane C of the bag body (# 3) 26 is bent to match the H line, and this portion is It is fixed with a cone 34, but before the bag body (# 3) 26 is folded, a release agent is applied so that the semi-finished products do not adhere to the top and bottom of the bladder. After pressing the bag body (# 3) 26 against the ABC portion of the outer drum 31 and pressure bonding, the cord / rubber combination bodies 11 and 12 of the bag body (# 2) 25 are adhered, and the surface of the raw bladder is lightly lightened by the inner tube 35. Wrap, attach strip rubber 20 (having the function of keeping the circular shape of the expansion bladder) (see FIG. 3) to the edge portion (IJ) of the bladder, and unwind the inner tube. Woven fabric after applying cement to the surface of the bladder 19
And attach the drum lid 32. Before adding steam in the vulcanization work, assemble a hose (not shown) so that compressed air can be inserted inside the bladder, inject air and steam at the same time to vulcanize, and release the pressure inside the bladder. After that, the drum lid 32 and the outer drum 31
To separate.
【0009】かくして、本発明により図3に示されるよ
うな望ましいブラダー完成品を得ることができる。すな
わち、ブラダーのカバーゴム18と本体プライ17およ
び内側ゴム16と、組立て部位の構成要素である金属コ
ード13,14はコード・ゴム組合せ体11,12で巻
き包まれて単一物となる。より詳細に言えば、上記の諸
構成要素がG部位からI部位までG−F−E−D−C−
B−A−Iの順にコード・ゴム組合せ体11,12によ
って包まれており、このときコード・ゴム組合せ体1
1,12は円周方向を基準にして90°に位置するよう
に配列される。そしてブラダーが膨張するときには、図
1の1Aのように維持してのみビードエーペックス7A
と各半製品の間が堅固に接着され、また本体プライ6A
の端部位(6A−1)とビード膨らみ部(ビードハン
プ)(BH)での空気含入量も最小化することができ
る。したがって、ブラダーを上記のように維持し得るよ
うにするためにはブラダーの各位置別ゲージを予め均一
に維持する必要があり、それで本体プライの結合部が膨
張しない組立て部位に位置するようにそれを内側ブラダ
ーの組立て部位に置いた。かくして、従来のブラダーが
有していたタイヤ品質の低下、性能の低下という問題が
解消された新規なブラダーが提供されることとなった。Thus, the present invention provides the desired finished bladder as shown in FIG. That is, the cover rubber 18 of the bladder, the main body ply 17 and the inner rubber 16, and the metal cords 13 and 14 which are components of the assembly portion are wrapped and wrapped by the cord / rubber combination bodies 11 and 12 to be a single body. More specifically, the above-mentioned components are G-F-E-D-C- from the G site to the I site.
It is wrapped with the cord / rubber combination bodies 11 and 12 in the order B-A-I, and at this time, the cord / rubber combination body 1
1, 12 are arranged so as to be located at 90 ° with respect to the circumferential direction. When the bladder expands, keep the bead apex 7A as shown in FIG. 1A.
Between the semi-finished product and each semi-finished product is firmly adhered, and the main body ply 6A
The air content at the end portion (6A-1) and the bead bulge portion (bead hump) (BH) can also be minimized. Therefore, in order to be able to maintain the bladder as described above, it is necessary to maintain the position gauges of the bladder evenly in advance, so that the joint portion of the body ply is positioned so that it does not expand at the assembly site. Was placed at the assembly site of the inner bladder. Thus, it is possible to provide a new bladder that solves the problems of tire quality and performance that the conventional bladders have.
【図1】生タイヤ成形機に組込まれた非作動状態のブラ
ダー(図面左側半分)およびタイヤ・ビード部の成形時
に膨張した状態のブラダー(図面右側半分)を示す。1 shows a non-actuated bladder incorporated in a green tire building machine (left half of the drawing) and a bladder inflated during molding of a tire bead portion (right half of the drawing).
【図2】タイヤ・ビード部の成形時に膨張したブラダー
を拡大図として示す。FIG. 2 is an enlarged view of a bladder that is inflated during molding of a tire / bead portion.
【図3】本発明内側ブラダーの縦断面構造図。FIG. 3 is a vertical sectional structural view of the inner bladder of the present invention.
【図4】内側ブラダーに組込まれるバルブの一部欠截側
面図。FIG. 4 is a partially cutaway side view of a valve incorporated in an inner bladder.
【図5】図6から図9までの各図と協働して本発明方法
の作業手順を示す。FIG. 5 shows the working procedure of the method of the present invention in cooperation with each of FIGS. 6 to 9.
【図6】図5、および図7から図9までの各図と協働し
て本発明方法の作業手順を示す。FIG. 6 shows the working procedure of the method of the present invention in cooperation with FIG. 5 and each of FIGS. 7 to 9.
【図7】図5、図6、図8および図9と協働して本発明
方法の作業手順を示す。FIG. 7 shows the working procedure of the method of the present invention in cooperation with FIGS. 5, 6, 8 and 9.
【図8】図5から図7まで、および図9と協働して本発
明方法の作業手順を示す。FIG. 8 shows the working procedure of the method of the present invention in cooperation with FIGS. 5 to 7 and FIG. 9.
【図9】図5から図8までの各図と協働して本発明方法
の作業手順を示す。FIG. 9 shows a working procedure of the method of the present invention in cooperation with each of FIGS. 5 to 8.
【図10】従来の内側ブラダーの縦断面図。FIG. 10 is a vertical sectional view of a conventional inner bladder.
【図11】従来の内側ブラダーの縦断面図。FIG. 11 is a vertical cross-sectional view of a conventional inner bladder.
【図12】内側ブラダー製造時に使用される折曲具の斜
視図。FIG. 12 is a perspective view of a folding tool used when manufacturing the inner bladder.
【図13】図14から図18までの各図と協働して従来
の内側ブラダー製造手順を説明する断面図。FIG. 13 is a cross-sectional view for explaining a conventional inner bladder manufacturing procedure in cooperation with each of FIGS. 14 to 18.
【図14】図13、および図15から図18までの各図
と協働して従来の内側ブラダー製造手順を示す。FIG. 14 shows a conventional inner bladder manufacturing procedure in cooperation with FIG. 13 and FIGS. 15 to 18.
【図15】図13、図14、図16から図18までの各
図と協働して従来の内側ブラダー製造手順を示す。FIG. 15 shows a conventional inner bladder manufacturing procedure in cooperation with FIGS. 13, 14, and 16 to 18.
【図16】図13から図15まで、図17、および図1
8の各図と協働して従来の内側ブラダー製造手順を示
す。16 through FIG. 17, FIG. 17, and FIG.
The conventional inner bladder manufacturing procedure is shown in cooperation with the drawings of FIG.
【図17】図13から図16まで、および図18の各図
と協働して従来の内側ブラダー製造手順を示す。FIG. 17 shows a conventional inner bladder manufacturing procedure in cooperation with FIGS. 13 to 16 and FIGS.
【図18】図13から図17までの各図と協働して従来
の内側ブラダー製造手順を示す。FIG. 18 shows a conventional inner bladder manufacturing procedure in cooperation with each of FIGS. 13 to 17.
1,1A 内側ブラダー(ショールダーブラダー:押圧
嚢) 2,2A 外側第一ブラダー(折返えし用ブラダー) 3,3A 外側第二ブラダー 4 タイヤ内側ライナー 5 タイヤ・サイドウォール 6 本体プライ 7 ビード・エーペックス 8 ベルト 9 トレッド 10 タイヤ成形機中央部材 11 ゴムシート 12 コード 13,14 金属コード 15 ゴムシート 16 内側ゴム 17 本体プライ 18 カバーゴム 19 織布 20 ストリップゴム 21 バルブ軸胴 22 バルブ基部ゴム 23 バルブ接合管 24 袋体 25 袋体 26 袋体 27 バルブ 30,30A 本体ドラム(モールド本体) 31,31A 外側ドラム(外側モールド) 32 ドラム蓋(モールド蓋) 34 錐 35 内側チューブ 39 折曲具 BH ビード膨らみ部1,1A Inner bladder (Shoulder bladder: Pressing sac) 2,2A Outer first bladder (Folding bladder) 3,3A Outer second bladder 4 Tire inner liner 5 Tire sidewall 6 Body ply 7 Bead apex 8 Belt 9 Tread 10 Tire molding machine central member 11 Rubber sheet 12 Cord 13,14 Metal cord 15 Rubber sheet 16 Inner rubber 17 Main body ply 18 Cover rubber 19 Woven cloth 20 Strip rubber 21 Valve shaft body 22 Valve base rubber 23 Valve joint pipe 24 bag body 25 bag body 26 bag body 27 valve 30,30A main body drum (mold body) 31,31A outer drum (outer mold) 32 drum lid (mold lid) 34 cone 35 inner tube 39 bending tool BH bead bulge portion
Claims (2)
ラム(30)のE′E部位にコード(12)とゴムシー
ト(11)の組合せから成るコード・ゴム組合せ体(1
1,12)とコードとゴムの半製品とから成る金属コー
ド(13,14)でもって組合せた袋体#2(25)を
挿入した後、外側ドラム(31)を組立てて前記袋体#
2(25)のコード・ゴム組合せ体を外側ドラム(3
1)のAB部位に付着し、ブラダーを構成する内側ゴム
(16)、本体プライ(17)およびカバーゴム(1
8)で組合された袋体#3(26)を、前記本体ドラム
(30)に挿入して、研磨したバルブ基部ゴム面(2
2)と付着した後、袋体#3の端部を外側ドラム(3
1)の基準面(C)に位置させ、バルブ接合管(23)
をバルブ軸胴(21)の螺子部に組立てた後、前記袋体
#3(26)の基準面(C)の反対端部(P3C)を裏
返してHラインに一致させ、錐(34)で固定し、前記
袋体#3(26)を外側ドラムのABC部位に押して圧
着した後、前記袋体#2(25)のコード・ゴム組合せ
体を接着し、生ブラダーの表面にセメントを塗布し、そ
の上に織布(19)のナイロン層をゴム面に付着した
後、表面をドラム蓋(32)で組立て、次いで圧縮空気
と蒸気を同時に注入して加硫することを特徴とするタイ
ヤ成形機用内側ブラダーの製造方法。1. A cord / rubber combination (1) comprising a combination of a cord (12) and a rubber sheet (11) at an E'E portion of a main body drum (30) which is an assembly portion of an inner bladder.
1, 12), a bag # 2 (25) combined with a metal cord (13, 14) consisting of a cord and a semi-finished product of rubber, and then the outer drum (31) is assembled to form the bag #
2 (25) cord / rubber combination to outer drum (3
The inner rubber (16) attached to the AB portion of 1) and constituting the bladder, the main body ply (17) and the cover rubber (1
The bag body # 3 (26) assembled in 8) is inserted into the main body drum (30), and the polished valve base rubber surface (2
2) and then attach the end of bag # 3 to the outer drum (3
Positioned on the reference plane (C) of 1), the valve joint pipe (23)
After assembling to the threaded portion of the valve shaft body (21), the end (P3C) opposite to the reference plane (C) of the bag body # 3 (26) is turned over so as to match the H line, and the cone (34) is used. After fixing, the bag body # 3 (26) was pressed against the ABC portion of the outer drum and pressure-bonded, then the cord / rubber combination body of the bag body # 2 (25) was adhered, and cement was applied to the surface of the green bladder. A tire molding characterized in that a nylon layer of a woven cloth (19) is adhered to a rubber surface thereof, the surface is assembled with a drum lid (32), and then compressed air and steam are simultaneously injected for vulcanization. Manufacturing method of inner bladder for machine.
成形機用内側ブラダー。2. An inner bladder for a tire building machine manufactured by the method of claim 1.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910009599A KR940003723B1 (en) | 1991-06-11 | 1991-06-11 | Bladder forming method for green tire |
KR1019910010808A KR940003724B1 (en) | 1991-06-27 | 1991-06-27 | Bladder for tire builder |
KR1991P9599 | 1991-06-27 | ||
KR1991P10808 | 1991-06-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05237957A true JPH05237957A (en) | 1993-09-17 |
JPH0785915B2 JPH0785915B2 (en) | 1995-09-20 |
Family
ID=26628638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4151890A Expired - Lifetime JPH0785915B2 (en) | 1991-06-11 | 1992-06-11 | Method of manufacturing inner bladder for tire molding machine and inner bladder |
Country Status (3)
Country | Link |
---|---|
US (2) | US5324375A (en) |
JP (1) | JPH0785915B2 (en) |
DE (1) | DE4219035C2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002337155A (en) * | 2001-05-15 | 2002-11-27 | Tlv Co Ltd | Steam vulcanizing apparatus |
KR100917758B1 (en) * | 2007-09-17 | 2009-09-15 | 금호타이어 주식회사 | Valveless type shoulder bladder |
JP2012086364A (en) * | 2010-10-15 | 2012-05-10 | Bridgestone Corp | Method and apparatus for manufacturing folded bladder for molding of tire |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1271479B (en) * | 1993-10-11 | 1997-05-28 | Pirelli | METHOD AND EQUIPMENT FOR THE CAPPING OF A COATING STRUCTURE ON A CIRCLE FOR VEHICLE TIRES |
US6676788B1 (en) | 1999-04-30 | 2004-01-13 | The Goodyear Tire & Rubber Company | Tire building bladder |
AU3777899A (en) * | 1999-04-30 | 2000-11-17 | Goodyear Tire And Rubber Company, The | Tire building bladder |
AU2152100A (en) * | 1999-11-18 | 2001-05-30 | Goodyear Tire And Rubber Company, The | Process and apparatus for tire manufacturing with optimized bead positioning |
US6758930B1 (en) | 1999-11-18 | 2004-07-06 | The Goodyear Tire & Rubber Company | Process and apparatus for tire manufacturing with optimized bead positioning |
IT1320456B1 (en) | 2000-06-27 | 2003-11-26 | Bridgestone Firestone Tech | DRUM FOR TIRE FORMING. |
KR100805330B1 (en) | 2007-02-14 | 2008-02-20 | 한국타이어 주식회사 | Building drum for green tire |
US10322554B2 (en) * | 2013-08-29 | 2019-06-18 | The Goodyear Tire & Rubber Company | Tire building drum |
US10166733B2 (en) | 2017-04-17 | 2019-01-01 | Bridgestone Americas Tire Operations, Llc | Expansion control device and tire mold using same |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6050601B2 (en) * | 1975-05-27 | 1985-11-09 | 横浜ゴム株式会社 | pneumatic tires |
US4707205A (en) * | 1985-07-25 | 1987-11-17 | Bishop Marshall E | Method for making an inflatable mandrel |
-
1992
- 1992-06-10 DE DE4219035A patent/DE4219035C2/en not_active Expired - Fee Related
- 1992-06-11 JP JP4151890A patent/JPH0785915B2/en not_active Expired - Lifetime
- 1992-06-11 US US07/897,130 patent/US5324375A/en not_active Expired - Lifetime
-
1994
- 1994-06-24 US US08/266,086 patent/US5468328A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002337155A (en) * | 2001-05-15 | 2002-11-27 | Tlv Co Ltd | Steam vulcanizing apparatus |
KR100917758B1 (en) * | 2007-09-17 | 2009-09-15 | 금호타이어 주식회사 | Valveless type shoulder bladder |
JP2012086364A (en) * | 2010-10-15 | 2012-05-10 | Bridgestone Corp | Method and apparatus for manufacturing folded bladder for molding of tire |
Also Published As
Publication number | Publication date |
---|---|
US5324375A (en) | 1994-06-28 |
JPH0785915B2 (en) | 1995-09-20 |
DE4219035A1 (en) | 1992-12-17 |
DE4219035C2 (en) | 1995-08-10 |
US5468328A (en) | 1995-11-21 |
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